CN210106587U - Positive and negative pressure dynamic rotary sealing structure - Google Patents
Positive and negative pressure dynamic rotary sealing structure Download PDFInfo
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- CN210106587U CN210106587U CN201920833441.8U CN201920833441U CN210106587U CN 210106587 U CN210106587 U CN 210106587U CN 201920833441 U CN201920833441 U CN 201920833441U CN 210106587 U CN210106587 U CN 210106587U
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Abstract
The utility model relates to a positive negative pressure dynamic rotary seal structure, it includes rotating ring and quiet ring, and they pass through seal sealing connection the rotating ring outside is equipped with two connection bosss, and two connection bosss divide into connection boss and lower connection boss, rotating ring and connection boss integrated into one piece be equipped with the recess on the connection boss, the seal is established between recess and quiet ring inboard. The utility model discloses can satisfy the low-speed rotation and keep sealed under dynamic rotation state.
Description
Technical Field
The utility model relates to a seal structure, concretely relates to positive negative pressure rotary seal structure.
Background
The original mechanical power seal needs the protection of cooling water, otherwise, the rotating friction heat transfer can cause fatal burnout damage to the sealing O-shaped ring; the relative position of the movable ring and the static ring needs to be adjusted to ensure the guarantee of the clearance; the spring has the possibility of failure, and the product rotating at high speed is applied to the product rotating at low speed and has poor cost performance.
Disclosure of Invention
The purpose of the invention is as follows: the utility model aims at overcoming the not enough among the prior art, provide one kind and can satisfy the low-speed rotation and keep the dynamic rotary seal structure of sealed positive negative pressure under the dynamic rotation state.
The technical scheme is as follows: in order to solve the technical problem, a positive negative pressure dynamic rotary seal structure, it includes rotating ring and quiet ring, they pass through seal sealing connection the rotating ring outside is equipped with two connection bosss, and two connection bosss divide into and connect boss and lower connection boss, rotating ring and connection boss integrated into one piece be equipped with the recess on the connection boss, the seal is established between recess and quiet ring inboard, there is the B cavity in the rotating ring, on connect for the A cavity between the rotating ring of boss top and the quiet ring, be the C cavity between rotating ring and the quiet ring of boss below down, A cavity and C cavity link to each other rather than the side system pressure chamber separately, and A cavity and C cavity are independent cavity separately, the B cavity links to each other with this side system pressure chamber of A cavity.
When the system operates at negative pressure, the cavity B is at negative pressure, the gas in the cavity A and the cavity C enters the cavity B, the gas in the cavity B returns to the system pressure cavity on the side of the cavity A, and the gas in the cavity A and the cavity C is not communicated.
When the system operates at positive pressure, the pressure of the cavity B is higher than that of the cavity A and the cavity C, the air in the cavity B enters the cavity A and the cavity C due to the pressure difference, and the air in the cavity A and the cavity C cannot circulate.
The utility model is suitable for an among the low-speed sealed rotary valve class product of rotating of low pressure.
Has the advantages that: compared with the prior art, the utility model, it is showing the advantage and is: the utility model has reasonable overall structure, the movable ring and the static ring adopt the sealing body made of the imported silicon rubber and the PTFE material to contact and be in clearance fit, the friction force generated by each other is small, the relative motion of the two rotating bodies can be ensured only by providing weak kinetic energy, the system is simpler and easier than the traditional system, and the cost is lower; the heat generated by the friction of the low-speed relative rotation is not enough to damage the low-speed relative rotation, so that the service life of the low-speed relative rotation can be ensured to be more than 5 years; sealing gas is used as a cooling medium for the friction part, so that the low temperature of the friction part is ensured; the sealing device is suitable for sealing large-caliber low-speed rotating parts, and has strong universality and high cost performance.
Drawings
FIG. 1 is a diagram of the positive pressure state of the present invention;
fig. 2 is a negative pressure state diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in figure 1, the positive and negative pressure dynamic rotary seal structure of the utility model comprises a movable ring 1 and a stationary ring 2 which are hermetically connected through a seal body 3, two connecting bosses 4 are arranged on the outer side of the movable ring 1, the two connecting bosses 4 are divided into an upper connecting boss and a lower connecting boss, the movable ring 1 and the connecting bosses 4 are integrally formed, a groove 5 is arranged on the connecting boss 4, the seal body 3 is arranged between the groove 5 and the inner side of the stationary ring 2, a B cavity 6 is arranged in the movable ring 1, an A cavity 7 is arranged between the movable ring 1 and the stationary ring 2 above the upper connecting boss, a C cavity 8 is arranged between the movable ring 1 and the stationary ring 2 below the lower connecting boss, the A cavity 7 and the C cavity 8 are respectively connected with a side system pressure cavity thereof, the A cavity 7 and the C cavity 8 are respectively independent cavities, the B cavity 6 is connected with the side system pressure cavity of the A cavity 7, when the system operates at positive pressure, the pressure of the cavity B6 is greater than that of the cavity A7 and the cavity C8, the pressure difference enables gas in the cavity B6 to enter the cavity A7 and the cavity C8, and the gas in the cavity A7 and the cavity C8 cannot circulate.
As shown in fig. 2, when the system operates at negative pressure, the inside of the cavity B6 is at negative pressure, the gas in the cavity a 7 and the cavity C8 enters the cavity B6, the gas in the cavity B6 returns to the system pressure cavity on the side of the cavity a 7, and the gas in the cavity a 7 and the cavity C8 are not communicated.
The utility model has reasonable overall structure, the movable ring and the static ring adopt the sealing body made of the imported silicon rubber and the PTFE material to contact and be in clearance fit, the friction force generated by each other is small, the relative motion of the two rotating bodies can be ensured only by providing weak kinetic energy, the system is simpler and easier than the traditional system, and the cost is lower; the heat generated by the friction of the low-speed relative rotation is not enough to damage the low-speed relative rotation, so that the service life of the low-speed relative rotation can be ensured to be more than 5 years; sealing gas is used as a cooling medium for the friction part, so that the low temperature of the friction part is ensured; the sealing device is suitable for sealing large-caliber low-speed rotating parts, and has strong universality and high cost performance.
The utility model provides a thinking and method, the method and the way of specifically realizing this technical scheme are many, above only the utility model discloses a preferred embodiment should point out, to the ordinary technical personnel in this technical field, not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improvements should also be regarded as the utility model discloses a protection range, each component that does not make clear and definite in this embodiment all can be realized with prior art.
Claims (3)
1. Positive negative pressure developments rotary seal structure, its characterized in that: the sealing structure comprises a movable ring (1) and a stationary ring (2) which are hermetically connected through a sealing body (3), wherein two connecting bosses (4) are arranged on the outer side of the movable ring (1), the two connecting bosses (4) are divided into an upper connecting boss and a lower connecting boss, the movable ring (1) and the connecting bosses (4) are integrally formed, a groove (5) is arranged on the connecting boss (4), the sealing body (3) is arranged between the groove (5) and the inner side of the stationary ring (2), a cavity B (6) is arranged in the movable ring (1), a cavity A (7) is arranged between the movable ring (1) and the stationary ring (2) above the upper connecting boss, a cavity C (8) is arranged between the movable ring (1) and the stationary ring (2) below the lower connecting boss, the cavity A (7) and the cavity C cavity (8) are respectively connected with a side system pressure cavity, and the cavity A cavity (7) and the cavity C cavity (8) are respectively independent cavities, and the cavity B (6) is connected with the system pressure cavity on the side of the cavity A (7).
2. The positive-negative pressure dynamic rotary seal structure according to claim 1, characterized in that: when the system operates at negative pressure, the cavity B (6) is at negative pressure, gas in the cavity A (7) and the cavity C (8) enters the cavity B (6), gas in the cavity B (6) returns to the system pressure cavity on the side of the cavity A (7), and the gas in the cavity A (7) and the cavity C (8) is not communicated.
3. The positive-negative pressure dynamic rotary seal structure according to claim 1, characterized in that: when the system operates at positive pressure, the pressure of the cavity B (6) is greater than that of the cavity A (7) and the cavity C (8), the gas in the cavity B (6) enters the cavity A (7) and the cavity C (8) due to the pressure difference, and the gas in the cavity A (7) and the cavity C (8) cannot circulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920833441.8U CN210106587U (en) | 2019-06-04 | 2019-06-04 | Positive and negative pressure dynamic rotary sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920833441.8U CN210106587U (en) | 2019-06-04 | 2019-06-04 | Positive and negative pressure dynamic rotary sealing structure |
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| Publication Number | Publication Date |
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| CN210106587U true CN210106587U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920833441.8U Active CN210106587U (en) | 2019-06-04 | 2019-06-04 | Positive and negative pressure dynamic rotary sealing structure |
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| CN (1) | CN210106587U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107691A (en) * | 2019-06-04 | 2019-08-09 | 江苏大信环境科技有限公司 | Positive/negative-pressure dynamic rotary sealing structure |
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2019
- 2019-06-04 CN CN201920833441.8U patent/CN210106587U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107691A (en) * | 2019-06-04 | 2019-08-09 | 江苏大信环境科技有限公司 | Positive/negative-pressure dynamic rotary sealing structure |
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